Methods and apparatuses for data transmission
In an embodiment, a communication device is provided comprising transmit circuitry and crosstalk reduction circuitry. In an embodiment, the crosstalk reduction circuitry is configured to receive crosstalk information indicative of crosstalk between a plurality of communication connections for only a part of communication channels of said communication connections.
1. A communication device, comprising:
a memory configured to store first crosstalk reduction parameters for a first subset of communication channels of a plurality of communication connections;
an interpolation circuit to determine second crosstalk reduction parameters for a second subset of communication channels of said plurality of communication connections based on said first crosstalk reduction parameters; and
a crosstalk reduction circuit configured to reduce crosstalk between said plurality of communication connections based on said first crosstalk reduction parameters and said second crosstalk reduction parameters.
2. The communication device of claim 1 ,
wherein said first subset of communication channels and said second subset of communication channels form a plurality of communication channels for communicating via said plurality of communication connections, and
wherein the communication channels of said first subset are distributed substantially evenly in said plurality of communication channels.
3. The communication device of claim 1 ,
wherein said interpolation circuit comprises an interpolation filter,
wherein said communication channels of said first subset and said second subset are located in a predetermined frequency range, and
wherein said interpolation filter comprises separate interpolation filters for at least two different portions of said frequency range.
4. The communication device of claim 1 ,
wherein said interpolation circuit comprises an interpolation filter, and
wherein said interpolation filter is chosen from the group comprising a linear filter and a higher order filter.
5. The communication device of claim 1 , wherein said interpolation circuit is configured to assign each second crosstalk reduction parameter a value of an adjacent crosstalk reduction parameter.
6. The communication device of claim 1 , wherein said second communication parameters are complex parameters, and wherein said interpolation circuit is configured to determine a real part and an imaginary part of said second communication parameters separately.
7. The communication device of claim 1 , wherein said second communication parameters are complex parameters, and wherein said interpolation circuit is configured to determine a magnitude and a phase of said second communication parameters separately.
8. The communication device of claim 1 , wherein said communication channels of said first subset and said second subset are arranged in a frequency range, and wherein said interpolation circuit is further configured to determine third crosstalk reduction parameters for a third subset of communication channels outside said frequency range based on said first crosstalk reduction parameters, and to determine said second crosstalk reduction parameters based on said first crosstalk reduction parameters and said third crosstalk reduction parameters.
9. The communication device of claim 1 , further comprising receive circuitry configured to receive training signals via a plurality of communication channels comprising said communication channels of said first subset and said second subset of said plurality of communication connections, wherein said communication device is further configured to determine said first crosstalk reduction parameters based on said training signals.